Aug 02 12:30:49.510 INFO checking config-0.9.0 against 1.27.2 for lazy_static-1
Aug 02 12:30:49.510 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:30:49.510 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:30:49.510 INFO running `"docker" "create" "-v" "/tmp/crater.GiReN6PhoGhL:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 12:30:49.784 INFO blam! 381cf236fb8ce7310723c84ad4328399e3e4c8bf1012d029ac236479444e57ba
Aug 02 12:30:49.787 INFO running `"docker" "start" "-a" "381cf236fb8ce7310723c84ad4328399e3e4c8bf1012d029ac236479444e57ba"`
Aug 02 12:30:51.393 INFO kablam!     Checking float-cmp v0.4.0
Aug 02 12:30:51.399 INFO kablam!     Checking config v0.9.0 (file:///source)
Aug 02 12:31:06.177 INFO kablam! warning: variable does not need to be mutable
Aug 02 12:31:06.177 INFO kablam!   --> tests/env.rs:57:9
Aug 02 12:31:06.178 INFO kablam!    |
Aug 02 12:31:06.178 INFO kablam! 57 |     let mut environment = Environment::with_prefix("C").separator("_");
Aug 02 12:31:06.178 INFO kablam!    |         ----^^^^^^^^^^^
Aug 02 12:31:06.178 INFO kablam!    |         |
Aug 02 12:31:06.178 INFO kablam!    |         help: remove this `mut`
Aug 02 12:31:06.178 INFO kablam!    |
Aug 02 12:31:06.178 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 02 12:31:06.178 INFO kablam! 
Aug 02 12:31:11.651 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 20.42s
Aug 02 12:31:11.683 INFO kablam! su: No module specific data is present
Aug 02 12:31:12.266 INFO running `"docker" "rm" "-f" "381cf236fb8ce7310723c84ad4328399e3e4c8bf1012d029ac236479444e57ba"`
Aug 02 12:31:12.360 INFO blam! 381cf236fb8ce7310723c84ad4328399e3e4c8bf1012d029ac236479444e57ba